<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <link rel="stylesheet" href="button.css" />
  </head>
  <body>
    <div>阿斯顿发</div>
    <button id="changeColor">changeColor</button>

    <button id="changeColorButton">changeColorButton</button>
    <!-- <script src="popoup.js"></script> -->
    <script src="popup.js"></script>
  </body>
</html>
